OK LET ME BREAK THIS DOWN FOR YOU ABE STYLE:
My friend and I play wario game and watch matches every night for like 3 hours
Ive got it down to a science so dont sweat
game and watch can be nasty against wario for several reasons:
1. No lag out of game and watchs key attack, really hard to avoid and or counter.
2. His fishbowl nair cancels out any attack, and does a heafty amount of damage.
3. There is essentialy no edge play against game and watch because his up b is invincible to anything.
as far as they key attacks are concerned, you need to be spamming short hop dair, which is warios drill. use this to move back and forth even when you don't intend for the atttack to strike. when hes coming down with the key, simply short hop dair to either side of him and foward smash. this is super effective, and once you become pro at shuffling warios dair you will be poning in no time.
the fishbowl is just something you have to be careful about, its hard to avoid and you can't beat it with anything. use proper spacing and just try to stay away from that...it helps to not be above him..
when game and watch is coming back, don't attempt to go over the edge unless hes really far from the stage. let him auto catch the ledge, and as he crawls back onto the stage, catch him with a dair, thus sending him back out. rinse and repeat as many times as you can, you wont believe how effective this is against every character.
Now for Warios super advantage against game and watch:: SUPER ARMOR ON HIS FOWARD SMASH
i will post videos soon, my friend is actually buying a dazzle today so we can record, but you need to utilize warios super armor on his foward smash. due to game and watches range, he almost always has to come within range of this attack to hit you.
this works against his:
foward air(the book or whatever)
back air(turtle head)
which he will almost try to use to give you a final blow. simply bait him in by shuffling back and forth with your shorthop dairs. as soon as you land and you know that hes coming, hit him with your foward smash. if you charged it at the right time, his move will be canclled by the super armor, sending him flying shocked and pissed as fvuck!!! this is sooo easy to pull off, make sure you use mind games.......
with this said you should be able to pone game and watch, ill have vids for ya soon if this wasnt helpful for ya...